Attachment for machines for sewing looped fabrics



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A..L. TRAVER. ATTACHMENT FOR MACHINES FOR SEWING LOOPED FABRIGS.

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'A. L. TRAVE'R. ATTACHMENT FOR MACHINES FOR SEWING LOOPED FABRICS. No. 50Z,4'78.-

Patented Aug. 1

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3 Sheets-Sheet 3. A. L. TRAVER.

ATTACHMENT FOR MAOHINES FOR, SEWING LOOPED FABRICS. No. 502,478.

Patented Aug 1', 1893.

UNITED STATES PATENT OFFICE.

ADELBERT LEE TRAVER, OF MELLENVILLE, NEW YORK.

ATTACHMENT FOR MACHINES FOR- SEWING LOOPED FABRICS.

SPECIFICATION forming part of Letters Patent No. 502,478, dated August 1, 1893.

Application filed October 24, 1892.

To all whom it may concern:

Be it known that I, ADELBERT LEE TRAVER, of Mellenville, county of Columbia, State of New York, have invented an Improvement in Stitch-Separating and Raveling Attachments for Machines for Sewing Looped Fabrics, of which the following description, in connection with the accompanying drawings, is a specification, like letters and figures on the drawings representing like parts.

This invention has for its object to improve and simplify that class of machine shown and described in United States Patent No. 431,957.

In the machine herein to be described the loop-destroyingdeviceiscarried by avibratin g lever mounted on a horizontal stud, said loop destroyer entering the loops of knitted fabric and by the upward inclination of its upperside breaking and destroying the loops, the loop destroyer crossing, and its upper edge traveling upwardly with relation to, the inner edge of one of the guide plates. Next the vertical edge of one of the guide plates is a raveling plate, the edge of which is presented in such position with relation to the stitch pins of the running-off machine as to contact with the fabric above the stitch pins, and the lever referred to as carrying the loop destroying device is also provided with a series of picking out fingers fulcrumed at their outer ends, and serrated at their under sides near their inner or free ends, said fingers acting against the portions of the fabric containing the destroyed loops, and forcing such portions over beyond the edge of the raveling plate and upon its upper side, and by friction picking or pulling out the broken yarn. These picking out fingers have combined with them adjusting devices to position their free ends correctly with relation to the edge of the raveling plate and they are acted upon by springs to keep them seated correctly in operative position upon the raveling plate during the time that they act to pick out the broken loops. I have also provided these fingers of the picking-out device with serrations at their under sides to better engage the broken loops and detach them from the body of the knitted fabric. The raveling-plate referred to is a separate piece detachably secured to the bedplate,the said raveling-plate in practice pref- Serial No. 449,856. (No model.)

erably having attached to it a throat of hardened steel, this hardened throat adding greatly to the life of the machine.

Figure 1, in perspective shows the front side of an apparatus embodying my invention; Fig. 2, an elevation of my improved apparatus looking at it in the direction of the arrow, Fig. Fig. 3, is an under side view of the machine shown in Fig. 1. Fig. 4, isa section on the lineoc Fig. 3, the apparatus being, however, overturned from the position Fig. 3; and Fig. 5, is a detail showing the inner face of the frame part A The device to be herein described, is, it will be understood, adapted to be secured to the frame-work of a turning-off machine, or to any machine having stitch pins adapted to hold knitted fabrics to be stitched.

Referring to the drawings, A represents a stand adapted, as stated, to be secured to any stationary part of the turning-off machine used, of Whatever form. This stand has adjustably secured upon it a frame A having a forward extension A which contains or supports a suitable bearing for the rotating shaft or having at one end a crank pin a which receives a link a pivoted at a to an arm a in turn pivoted upon a stud a preferably made adjustable on the frame by or through a nut a, the slot in the frame being of larger diameter than the part of the stud extended through it.

The hub of the arm a embracing the stud a looselyis represented as slottedand clamped together by suitable screws 1), the hub of the arm being prevented from slipping off the stud by a suitable collar 1) confined in posisition by the set screw 12 The vibrating arm a in this instance of my invention carries a loop-destroying device 0, shown as a curved blade, attached to the arm by a suitable set screw c, The adjustment of the stud a vor tically enables the point of the loop destroying device to penetrate the knitted fabric at This arm has a suit-able stud (1 upon which is pivoted a series of broad, flat fingers d conadjusting screws 01 inserted in a cross bar d attached by screws or otherwise to the said arm. The adjustment of the set screws en ables the acting ends of the fingers to be put into the proper position with relation to the raveling-plate e or throat e thereon made as a thin piece of steel attached to the plate 6'. The adjustment of the fingers d by the screws (1 referred to enables them to be adapted to the thickness of the Work to be picked out;

The frame-work has attached to it an outer guide plate B provided with slots 12 through which reciprocate the fingers d of the picking-outdevice, and .the under sides of these fingers are serrated as at 2 to enable them to get a better hold upon the loops which have been broken or destroyed by the loop-destroyer, c.

The raveling plate 6, the shape of which is best represented in the under side view Fig. 3, is attached to the frame part A by suitable screws e one edge of said plate in practice being located at a short distance above the stitch pins holding the knitted fabric, the picking-out fingers in their movement bending the fabric, having the destroyed loops of yarn, over the edge of the raveling plate and upon its upper side, the said fingers traveling along over the upper side of said plate and being borne down on the knitted fabric by' the springs (P.

The frame part A has an extension A on which is pivoted at A a deflector e substantially such as shown and described in my Patent No. 490,417, dated January 24:, 1893, but

herein I have provided the apparatus with a sleeve h in which is an adjusting screw h to act on asprimg h whichin turn presses againstthe back edge of the deflector. By adjusting the screw 7L2, the deflector acted on by said spring is kept pressed against the work hanging on the stitch pin, the direction of pressure being toward the base of the stitch pin to thus keep the material upon the stitch pins and at the same time the deflector prevents the fabric below the stitch pins from being lifted and thrown out of shape while the loop destroying device and the picking out device act. The knitted fabric having been impaled on the stitch pins, common to said patent and to said application, is fed by the pin wheel between the guide plates B, B, which are substantially as in said patent and application, said guide plates receiving between them and acting on the cut edges of the knitted fabric or material above the stitch pins to smooth out the wrinkles and curls therein. The plate 13- nearest the base of the stitch pins and connected to frame A by screws 18, is made short, see Fig. 5, and its inner end terminates as a vertical edge 8, across which moves the loopdestroying blade, its inclined top edge movin g vertically with relation to the said edge Sin the reciprocations of the blade and while the said loop-destroyer is passing through the knitted fabric in the process of destroying the surplus loops in order that the thread of which they are composed may be subsequently picked out by the fingers d. The plate B prior to this has had a short slot, but herein I have that it is impossible for any of the detached yarn to collect in the apparatus and thus interfere with the free movement of theloopdestroyer.

The plate 13 has been provided with a gate 9, see Figs. 3 and 5,'which may be raised and lowered with relation to the upper side of the usual stitch pins was to prevent the work thereon from getting between the stitch pins and the lower edge .of the guard plate B'located nearest the base of the stitch pins.

The detachable raveling plate 6 for some classes of work might be omitted and the fingers d be permitted to act directly against a portion of the plate 6.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a raveling apparatus adapted to be applied to a running-oif machine having stitch points, the combination with the frame-work, the horizontal stud a ,the vibrating lever a mounted on said stud, the loop-destroying plate attached to said lever, a rotating shaft, intermediate devices to actuate said lever, the slotted guide-plate B, the-short guideplate B having the vertical edge 8 across which the loop-destroying plate travels, and the raveling plate, one edge of which acts as a support for one face of the material above but close to the stitch pins, combined with a yielding picking-out finger carried by said lever a and serrated at its under side and adapted to act against the part of the material containing the destroyed loops, push said material over the top of the raveling plate, and detach the yarn of the destroyed loops, substantially as described.

2. In a raveling apparatus adapted to be applied to a running-off machine having stitch points, the combination with the frame-work, the horizontal stud a the vibrating lever a mounted on said stud, the loop destroying plate attached to said lever, a rotating shaft, intermediate devices to actuate said lever, the slotted guide-plate B, the short guideplate B having the vertical edge 8 across which the loop destroying plate travels, and the raveling plate, one edge of which acts as a support for one face of the material above but close to the stitch pins, combined with yielding picking-out fingers carried by said lever a and devices to adjust the position of the free ends of the fingers vertically with relation to the edge of the raveling plate, substantially as described.

3. In a raveling apparatus adapted to be applied to a running-off machine having stitchpoints, the combination with the frame-work, the horizontal stud a, the vibrating lever d mountedon said stud, the loop-destroying the loop-destroying plate travels, and the raveling plate, one edge of which acts as a support for one face of the material above but close to the stitch pins, and provided with the throat piece e, combined with a yielding picking-out finger carried by said lever a and serrated at its under side and adapted to act against the part of the material containing the destroyed loops, push said material over upon the top of the raveling plate and detach the yarn of the destroyed loops, substantially as described.

4:. In a ravelin g apparatus adapted to be applied to a running-off machine having stitch points, the combination with the frame-work, the horizontal stud a the vibrating lever a mounted on said stud, the loop-destroying plate attached to said lever, a rotating shaft, intermediate devices to actuate said lever, the slotted guide-plate B, the short guideplateB havingthe vertical edge 8 across which the loop-destroying plate travels, and the raveling plate, one edge of which acts as a support for one face of the material above but close to the stitch pins, combined with yielding picking-out fingers carried by said lever of, devices to adjust the position of the free ends of the fingers vertically with relation to the edge of the raveling plate, and springs to keep said fingers down in working position, substantially as described.

5. In a ravelin g apparatus adapted to be applied to a running-off machine having stitch points, the combination with the frame-work, the horizontal stud a the vibrating lever a mounted on said stud, the loop-destroying plate attached to said lever, a rotating shaft, intermediate devices to actuate said lever, the slotted guide-plate B, the short guideplate B having the vertical edge 8 across which the loop-destroying plate travels, and the raveling plate, one edge of which acts as a support for one face of the material above but close to the stitch pins, combined with a yielding picking-out finger carried by said lever a and serrated at its under side and adapted to act against the part of the material containing the destroyed loops, push said material over upon the top of the raveling plate, and detach the yarn of the destroyed loops, and with a deflector to keep the work down as described while the loop destroyer acts, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ADELBERT LEE TRAVER. Witnesses:

WILLIAM ROWE, H. H. CAMERON; 

